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https://issues.apache.org/jira/browse/CASSANDRA-5821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13750940#comment-13750940
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Ben Manes commented on CASSANDRA-5821:
--------------------------------------
Thanks Ryan. This makes sense as the goal of the previous version(s) were low
overhead in real-world workloads. The newest version removes overhead in
synthetic workloads as well. That may not translate into significant
application gains as most of the time is hopefully spent elsewhere. The
observable benefit might be less pressure on the young gen GC as reads no
longer create garbage in the heap.
> Test new ConcurrentLinkedHashMap implementation (1.4RC)
> -------------------------------------------------------
>
> Key: CASSANDRA-5821
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5821
> Project: Cassandra
> Issue Type: Test
> Reporter: Ryan McGuire
> Assignee: Ryan McGuire
>
> There are some [improvements being made to CLHM|
> https://code.google.com/p/concurrentlinkedhashmap/source/detail?r=888ad7cebe5b509e5e713b00836f5df9f50baf32]
> that we should test.
> Create a small enough dataset that it can fit in memory and devise a test
> that has a high key cache hit rate, and compare results to CLHM 1.3 we
> already use.
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